164018538 has 12 divisors (see below), whose sum is σ = 355373538. Its totient is φ = 54672840.

The previous prime is 164018537. The next prime is 164018599. The reversal of 164018538 is 835810461.

164018538 is a `hidden beast` number, since 1 + 640 + 1 + 8 + 5 + 3 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 121286169 + 42732369 = 11013^2 + 6537^2 .

It is not an unprimeable number, because it can be changed into a prime (164018537) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4556053 + ... + 4556088.

Almost surely, 2^164018538 is an apocalyptic number.

164018538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

164018538 is an abundant number, since it is smaller than the sum of its proper divisors (191355000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164018538 is a wasteful number, since it uses less digits than its factorization.

164018538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9112149 (or 9112146 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 164018538 is about 12806.9722417127. The cubic root of 164018538 is about 547.3909909952.

Adding to 164018538 its reverse (835810461), we get a palindrome (999828999).

The spelling of 164018538 in words is "one hundred sixty-four million, eighteen thousand, five hundred thirty-eight".